Refreshed gcc predefines __ANDROID__

Change-Id: Id76f5a7490fba8190329e5ce3c4b138976a034ce
diff --git a/core/combo/TARGET_linux-arm64.mk b/core/combo/TARGET_linux-arm64.mk
index 83fda7b..2d344de 100644
--- a/core/combo/TARGET_linux-arm64.mk
+++ b/core/combo/TARGET_linux-arm64.mk
@@ -101,9 +101,6 @@
     -Werror=pointer-to-int-cast \
     -Werror=int-to-pointer-cast \
 
-# TODO - remove __ANDROID__ after the next aarch64 toolchain refresh
-TARGET_GLOBAL_CFLAGS += -D__ANDROID__=1
-
 TARGET_GLOBAL_CFLAGS += -fno-strict-volatile-bitfields
 
 # This is to avoid the dreaded warning compiler message: